/Engine/Source/Runtime/Core/Public/GenericPlatform/GenericPlatformProcess.h
Launch a uniform resource locator (i.e.http://www.epicgames.com/unreal). This is expected to return immediately as the URL is launched by another task. The URL param must already be a valid URL. The URL is passed through the filter parameter for an added measure of security if the URL is from and untrusted source. If you're looking for code to properly escape a URL fragment, useFGenericPlatformHttp::UrlEncode.
true if URL passed the filter and was launched, false if it was rejected by the filter.
static bool LaunchURLFiltered ( const TCHAR * URL, const TCHAR * Parms, [FString](API\Runtime\Core\Containers\FString) * Error, const [UE::Core::FURLRequestFilter](API\Runtime\Core\Misc\FURLRequestFilter) & Filter )